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2 Sheets-Sheet 1.

(No Model.)

T. J. RIDER.

DUPLEX PUMEING ENGINE.

No. 324,488. Patented' Aug. 18, 1885.

mi mn- N.' PETERS. Pham-mmv. Waihngan. D. C

(No Model.) 2 Sheets-Sheet 2.

T. J. RIDER. y

DUPLEX PUMPING ENGINE. No, 824,488. Patented Aug'. 18, 1885.

NITED STATES PATENT einen@ THOMAS J. RIDER, OF NEW YORK, N. Y., ASSIGNOR OF ONE HALF TO COR- NELIUS H. DE LAMATER, GEORGE H. ROBINSON, ANDv WILLIAM DE LAMATER, ALL OF SAME PLACE.

DUPLEX PUMPING-ENGINE.

EPECIFICATEON forming part of Letters Patent No. 324,488, dated. 18, i835.

i Application filed June 18, 1885. (No model.)

T all whom, t may concern: Beit known that I, THOMAS J. RIDER, of the city and county of New York,in theState of New York, have invented a new and useful Improvementv in Duplex Pumping-Engines, of which the following isaspeciication. My invention relates to duplex steam-pum ps or pumping-engines wherein the valve of each engine is operated from the piston-rod of the to other engine; andeit consists inv novel combinations of parts, vwhich are .hereinafter Ydescribed, and pointed outin the claims.

In the accompanying drawings, Figure l is a plan of a duplex engine embodying my invention, the steam-chests only of the two en` gines beingshown in horizontal section.Y Fig. 2 is a vertical longitudinal section in a plane between the two steam cylinders and the trunks or braces connecting them with the 2O water-cylinders, the water cylinders or chambers being shown inelevation. Fig. 3 is a longitudinal section through one ofthe engines.' Fig. 4 is an irregular transverse section in a plane through the steam-cylinder and valve- 2'5 chest of one engine, and through the trunk or connecting-brace which extends between the steam and water cylinders ofthe other engine, and Fig. 5 is a transversesect-ion of the Water cylinders or chambers upon the plane of the 3o dotted line :c x, Fig. 8.

Similar letters of reference designate corresponding parts in all the figures. t.

A A designate the steaurcylinders, andB B designate the water chambers or cylinders,

which are connected with the steam-cylinders A c', through which areinserted bolts for securing it in place, as shown by dotted lines in Fig. 5. Y

Below the water chambers or casings B Bl is formed a suction chest or passage, B2` having feet or flanges B3, by which it is supported, and to which water is admitted by a suction- .thebottom by an exhaust pipe or trunk, A2,

from whichleads an exhaust-pipe, A3, and which is constructed with feet or flanges A4, whereon the steam end ofthe engine is supported.

'As here represented, the trunks or braces C C are formed in the saine integral casting with the front heads B6 of the'water end of the engine, and with the front heads A5 of the steam'cylinders.

y'The water-chambers for the twopumps may be formed advantageously in the'same cast-ing, 8o as here shown; but as the steam-cylinders with their ports arel more difcult castings to make it is desirable to make them in separate castings. By this. construction I am enabled to provide a pumphaving any suitable propor- S5 ytions lof cylinders, by taking two separate steam-cylinders of the desired size, and making the two'trunks on braces in one casting at proper distances apart vfrom center, to center, andthe. water chambers or casings in another 9o casting, with the same proportion from center to center; vThe-water chambers or casing-s are afforded ample-support by the feet or vflanges B3, and the steam-cylinders are afforded am-v ple support by the exhaust-pipe A2, having feetor flanges A4.

D D' designate the two piston-rods ol' the engine, which work through suitable stnliingboxes provided in the heads A5 B, and to each of which are attached steam and water pistons.

In Fig. 3 l have shown the steam and water pistons D2 D", which operate in the cylinders or casi ngs A' B. These pistons may be of any suitable construction, as they form no part of my present invention.

The two steam cylinders, A A', are snrmonnted by steam-chests or valve-chests E E', wherein are slide-valves F F', which control the operation of the two engines. As here represented, the steam-chests are connected by a cross-pipe, E, with which the steam-supply pipe may be colmected. Each cylinder has near its ends supply-ports a and exhaustports a', and between the two exhaust-ports is a main exhaust space or cavity, a?, which communicates by a passage, a3, extending circumferentially to the bottom ofthe cylinder, with the exhaust-pipe A2, as shown in Fig. 4. The movement ot' the slide-valve F or F controls the admission of steam through the passages (t a to the cylinder, and also controls the eX- haust of steam through the passages a' from the ends of the cylinder to the main exhaust space or cavity a?. Each valve has formed upon its back a fork or yoke, d, in which operates a toe, c, and the toes which operate the two valves are formed upon or secured to the rock-shafts G G', by the oscillating movement of which said toes are caused to act upon the valves, to shift them in one direction 0r the other. The piston-rods D D' have secured upon them horizontally-extending arms H H', which project through and work in slots f, formed in the inner sides of the trunks or braces C C', and these arms H H are respectively connected by rods I I' with arms J J secured to and extending downward from the rock-shafts G' G.

It will be understood from the above description that the arm H on the piston-r0d D is connected by the rod I with the arm J', which operates the rock-shaft G' for moving the valve F', and in like manner the arm H of the piston-rod D' is connected by the rod I' with the arm J, which operates the rockshaft G and the valve F. The dwell which is necessary at each end of the stroke is obtained by the play which the toe e of each rock-shaft G G' has in the fork or yoke d on the back of each valve F F'.

f that the connections between the piston-rods and valves are very simple and inexpensive, and that they are all arranged between the cylinders of the two engines, and do not project outward beyond the cylinder or trunks in any direction.

Vhat I claim as my invention, and desire to secure by Letters Patent, is

l. In a duplex pumping-engine having separate valve-chests mounted upon its steamcylinders, the combination, with two valves arranged one in each chest, and rock-shafts for operating the valves extending laterally through the inner sides of the steam-chests and across the space between the chests, of arms depending from said rock-shafts, arms projecting laterally inward from the pistonrods, and rods extending between the two steam-cylinders, and by which the arms upon the two piston-rods are connected each with the rock-shaft arm of the other engine, substantially as herein described.

2. In a duplex engine, the combination, with the two steam-chests, E E', and their valves, of bonnets secured to the inner sides of the steam-chests and constructed with stuffing-boxes, rock-shafts G G', each extending through and journaled in one bonnet, and having its outer end litt-ing a bearing in the other bonnet, arms J J' depending from the rockshafts, arms H H' extending laterally from the piston-rods, and rods I I', whereby the arms H H are respectively connected with the rock-shaft arms J J, substantially as herein described.

3. In a duplex engine, the combination, with stea1n-cylinders,each having a circumferential exhaust-passage extending from top to bottom, of a cross exhaust-pipe, A2, connecting the cylinders and communicating with the exhaust-passages, and forming feet whereon the cylinders are supported, substantially as herein described.

4. In a duplex engine, the combination, with two steam-cylinders consisting of separate castings, each having an exhaust-passage extending t'rom top to bottom, and an exhaustpipe connecting the cylinders, and constructed with supporting feet or standards, of two water cylinders or chambers formed in the same integral casting, and trunks or braces connecting the steam-cylinders with their opposite water cylinders or chambers, substantially as herein described.

5. In a duplex engine, the combination, with two steam-cylinders, A A', consisting of separate castings, each having the circumferential exhaust-passage a3, and the connecting exhaust-pipe A2, with its feet or flanges A4, of the water chambers or cylinders B B', formed in one integral casting, and the trunks or braces C C', also formed in one integral casting, and connecting the cylinders A A with the chambers or cylinders B B', substantially as herein described.

THOMAS J. RIDER.

Witnesses:

C. C. CAPES, HARRY F. LY'rLn.

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